void FSCSEditorViewportClient::Tick(float DeltaSeconds)
{
FEditorViewportClient::Tick(DeltaSeconds);
// Register the selection override delegate for the preview actor's components
TSharedPtr<SSCSEditor> SCSEditor = BlueprintEditorPtr.Pin()->GetSCSEditor();
AActor* PreviewActor = GetPreviewActor();
if (PreviewActor != nullptr)
{
TInlineComponentArray<UPrimitiveComponent*> PrimitiveComponents;
PreviewActor->GetComponents(PrimitiveComponents);
for (int32 CompIdx = 0; CompIdx < PrimitiveComponents.Num(); ++CompIdx)
{
UPrimitiveComponent* PrimComponent = PrimitiveComponents[CompIdx];
if (!PrimComponent->SelectionOverrideDelegate.IsBound())
{
SCSEditor->SetSelectionOverride(PrimComponent);
}
}
}
else
{
InvalidatePreview(false);
}
if ( PreviewActor != LastPreviewActor.Get() || PreviewActor == nullptr || IsRealtime() )
{
LastPreviewActor = PreviewActor;
Invalidate();
RefreshPreviewBounds();
}
// Tick the preview scene world.
if (!GIntraFrameDebuggingGameThread)
{
// Ensure that the preview actor instance is up-to-date for component editing (e.g. after compiling the Blueprint, the actor may be reinstanced outside of this class)
if(PreviewActor != BlueprintEditorPtr.Pin()->GetBlueprintObj()->SimpleConstructionScript->GetComponentEditorActorInstance())
{
BlueprintEditorPtr.Pin()->GetBlueprintObj()->SimpleConstructionScript->SetComponentEditorActorInstance(PreviewActor);
}
// Allow full tick only if preview simulation is enabled and we're not currently in an active SIE or PIE session
if(bIsSimulateEnabled && GEditor->PlayWorld == NULL && !GEditor->bIsSimulatingInEditor)
{
PreviewScene->GetWorld()->Tick(IsRealtime() ? LEVELTICK_All : LEVELTICK_TimeOnly, DeltaSeconds);
}
else
{
PreviewScene->GetWorld()->Tick(IsRealtime() ? LEVELTICK_ViewportsOnly : LEVELTICK_TimeOnly, DeltaSeconds);
}
}
}
void FSCSEditorViewportClient::UpdatePreviewActorForBlueprint(UBlueprint* InBlueprint, bool bInForceFullUpdate/* = false*/)
{
AActor* PreviewActor = GetPreviewActor();
// Signal that we're going to be constructing editor components
if(InBlueprint != NULL && InBlueprint->SimpleConstructionScript != NULL)
{
InBlueprint->SimpleConstructionScript->BeginEditorComponentConstruction();
}
// If the Blueprint is changing
if(InBlueprint != PreviewBlueprint || bInForceFullUpdate)
{
// Destroy the previous actor instance
DestroyPreview();
// Save the Blueprint we're creating a preview for
PreviewBlueprint = InBlueprint;
// Spawn a new preview actor based on the Blueprint's generated class if it's Actor-based
if(PreviewBlueprint && PreviewBlueprint->GeneratedClass && PreviewBlueprint->GeneratedClass->IsChildOf(AActor::StaticClass()))
{
FVector SpawnLocation = FVector::ZeroVector;
FRotator SpawnRotation = FRotator::ZeroRotator;
// Spawn an Actor based on the Blueprint's generated class
FActorSpawnParameters SpawnInfo;
SpawnInfo.bNoCollisionFail = true;
SpawnInfo.bNoFail = true;
SpawnInfo.ObjectFlags = RF_Transient;
// Temporarily remove the deprecated flag so we can respawn the Blueprint in the viewport
bool bIsClassDeprecated = PreviewBlueprint->GeneratedClass->HasAnyClassFlags(CLASS_Deprecated);
PreviewBlueprint->GeneratedClass->ClassFlags &= ~CLASS_Deprecated;
PreviewActorPtr = PreviewActor = PreviewScene->GetWorld()->SpawnActor( PreviewBlueprint->GeneratedClass, &SpawnLocation, &SpawnRotation, SpawnInfo );
// Reassign the deprecated flag if it was previously assigned
if(bIsClassDeprecated)
{
PreviewBlueprint->GeneratedClass->ClassFlags |= CLASS_Deprecated;
}
check(PreviewActor);
// Ensure that the actor is visible
if(PreviewActor->bHidden)
{
PreviewActor->bHidden = false;
PreviewActor->MarkComponentsRenderStateDirty();
GetWorld()->SendAllEndOfFrameUpdates();
}
// Prevent any audio from playing as a result of spawning
if(GEngine->AudioDevice)
{
GEngine->AudioDevice->Flush(GetWorld());
}
// Set the reference to the preview actor for component editing purposes
if(PreviewBlueprint->SimpleConstructionScript != NULL)
{
PreviewBlueprint->SimpleConstructionScript->SetComponentEditorActorInstance(PreviewActor);
}
// Run the construction scripts again, otherwise the actor will appear as though it's had a script pass first, rather than the default properties as shown in the details panel
PreviewActor->RerunConstructionScripts();
}
}
else if(PreviewActor)
{
PreviewActor->RerunConstructionScripts();
}
// Signal that we're done constructing editor components
if(InBlueprint != NULL && InBlueprint->SimpleConstructionScript != NULL)
{
InBlueprint->SimpleConstructionScript->EndEditorComponentConstruction();
}
Invalidate();
RefreshPreviewBounds();
}